Given the potential of sound to facilitate event recognition, researchers have attempted to combine the audio and visual signals [1]}, [2]}, [3]}, [4]}, [5]}, [6]}, [7]}, [8]}, [9]}. Still, audio-visual event recognition is not easy as it is difficult to effectively use the audio information. In fact, audio can be corrupted with irrelevant background noise and sounds. Moreover, some event such as Shaking hands does not produce a particular sound signature.
